Improvement in looms



2Sheets--Sheer2. J. S. DAVIES &-W. E. YATES.

Improvement in Looms.

No. 115,938. f/ 3.5. Pafentedunelsnaf.

UNITED STnTEs PATENT @Enron JOHN STGR-EY DAVIIIS AND WALTER EDW'ARD YA'IES, OF MAXCHESTER,

` GREAT BRITAIN.

IMPRCVEMENT IN LOOMS.

Specification forming part of Letters Patent No. 115,938, dated June lil, 1871.

ain and' Ireland, have invented certain Im-r provements in Looms for Weaving, of which Letters Patent of the Kingdom of Great Britain and Ireland were granted to us March 20, No. 90S. y

Nature and Object of Vthe I mention.

Our invention relates to certain improvements in looms, too fully described hereafter to need preliminary explanation; the said iinprovements havingfor their object the uniform delivery of the warp, the regulation of its tension, the construction of the reed so as to be more durable and efficient, and the arrangement of the swell so as to be readily adjusted. y

Description of the Accompanying Drawing.

Figrire 1, Sheet No. 1, is a rear elevation of a loom with our improvements; Figs. 2 and 3, sectional elevations of part of the loom. Figs. 5 to 11, Sheet No. 2, detached views, drawn to an enlarged sca-le, of parts of the loom.

General Description..

In Figs. l to 7, et is a rod forming the fulcrum of the double levers b b', supported by the bracket secured to the framing c of the loom immediately above Vthe lianges of the warp-beam d. The upper or shorter levers b b carry or support a bar or rod,e, passing under and supporting the warp-threads as they pass from the beam d. The lower or longer levers b b carry a rod, f, that lies against the yarn of the beam and passes under the last fold or lap of the warp ends. The upper levers, carrying the rod e, are supplied with a projecting bracket, g, which supports an adjusting-screw and nut, li. The lower end of this screw, underneath the bracket g, is connected to a rope, cord, er chain, 7c, that is caused to pass rst around the drag-pulley of the warp-beam,then under a carrier-puller, l, connected to the lower frame of the loom below the warp-beam, after which it passes onward and is attached to one end of a rod connected to one end of the reversible lever u, the fulcrurn of which is secured to the link m., forming part of a helical or coiled spring, i. This helical spring is the medium or connection between the ends of the two cords, ropes, or chains k. The opposite end of such spring from the reversible lever is attached to a rope or chain which passes, in a similar manner as the one already described, around the opposite drag-pulley of the warp-beam to the adjustable screw h, supported by the bracket secured to the fulcrumshaft a of the lever c, on the opposite side of the loom. v

When the loom is ready for action the tension of the warps is first adjusted by the nuts and screws h It, which tighten up the ropes k k, passing around the drag-pulley ot' the warpbeam d, connected to the coupling-spring i.

,The action of tightening up these cords or ropes, through the medium of the nuts and screws h, is continued until the required tension of A the warp is obtained. When the tension isv accomplished and the loom in action the beating up of the sley when closing in the weft, at which time the crank is on its front center, as shown at Fig. 2, draws forward the top bar e, thereby causing the lower rod f to exert a pressure upon the warp-threads that gives an excess of tension .to the same at the time of beating home the weft-shot, which effects a cover upon the cloth under manufacf ture. On the return of the sley, when the shed is forming and the sley is on its bottom center, (eide Fig. 3,) the upper'rod or bar e is caused to incline outward, causing thereby the lower rod f against the beam to become relieved so as to reduce its ytension upon the warp, simultaneously with which the ropes encircling the drag-pulleys of the beam are also eased, which allows the necessary quantity of yarn to be drawn easily from the warp-beam sufcient for the next pick, and the healds to open the shed without strain or tension upon the yarn. Again, as the diameter of the beam becomes reduced with the delivery of yarn therefrom the lower tension-rod f is carried with the passing warp-threads gradually nearer to the beam, thereby effecting, during the delivery of the yarn, a proportionate reduction of tension to the springs forming the coupling between the ends of the ropes K K. When itis desired to let backthe warp a temporary release is given to the yarn through the me dium of the lever fn, which, when pulled over into a position the reverse of that shown at Fig. 1, relieves the spring i, the original tension being readily obtained on recommencing weaving by passing the lever n into its original position.

Figs. 8, 9, 10, and 11 represent the dents7 composing the reed, which it will be seen are of a greater width midway between their supporting-bars a a than at their points near such bars. vThe top and bottom terminations of each dent are provided with oval holes, as seen at Fig. 10, or recesses, as seen at Fig. 11, through or :into which they are slipped or placed onto their parallel supporting-bars a a, the two bars being connected at either end by the tie-rods b b. The distance or spaces of the dents upon the rods are effected by placing between each dent a washer, which at the sel vage ends of the reed may be composed of India rubber, which, yielding, will allow the end dents only to be forced closer together to produce a denser edge or selvage to the cloth. By the arrangement of reed, damaged dents can be readily displaced by slackening the nuts c c, and new ones put in their places.

Fig. 5 represents a plan view of the shuttlebox, showing the position of the swell in relation to the shuttle-box. Fig. 6 represents another modication of the swell and its supporting-bracket, showing an arrangement of adjustment for giving more or less inclination to the swell in the box; and Fig. 7 represents a transverse section of the same. In these gures d is the swell, supported bythe bra-ckets or arms e, secured to the stop-rod f. The distance the' swell l `is allowed to protrude in the shuttle-box g is regulated by the set-screws h. Thus,when the shuttle enters the box the swell moves bodily back, giving, by the form of its incline surface, owing to its protruding to the greatest extent near its outer end,an increased resistance to the shuttle on its conlpleting its race; but when the shuttle is again expelled the resisting incline, acting then upon the shuttle in its reverse direction, at once re,- lieves and assists, by the pressure of its ineline, the expulsion ofthe shuttle into the opposite box.

Ve claim- 1. The rod or shaft e, with its arms, carrying the rods e f and its arms g, in combination with the warp-beam, the cords 7c 7c, spring z', and pulleys l Z, the whole operating substantially as described.

2. The combination of the above and a dcvice, substantially as described, for tightening and releasing the cords k, as set forth.

3. A reed, consisting of'a central row of stationary dents, and at each end a series of dents separated by elastic washers, as and for the purpose described.

4. The adjustable swell d, in combination with the brackets e and stop-rod f, substantially as set forth. I

Inwitness whereof we have hereunto set our hands in the presence of two subscribing witnesses this the twenty-first day of July, one thousand eight hundred and seventy.

JOHN STOREY DAVIES. WALTER EDWARD YATES. Vitn esses:

WILLIAM Lnwrs, HANDFORD JONES. 

